Precision Chemistry最新文献_第8页

Precision Chemistry Pub Date : 2025-02-24

Christopher M. Butch, Patrick C. Hillesheim* and Arsalan Mirjafari*,

引用次数: 0

Dual Free Radical Synergism for Enhancing Proton Conductivity in Photochromism iHOFs. 双自由基协同作用增强光致变色iof中质子电导率。

Precision Chemistry Pub Date : 2025-02-20 eCollection Date: 2025-04-28 DOI: 10.1021/prechem.4c00102

Cheng Liu, Xu-Yong Chen, Xiao-Jie Cao, Wenmin Zhang, Li-Hui Cao

{"title":"Dual Free Radical Synergism for Enhancing Proton Conductivity in Photochromism iHOFs.","authors":"Cheng Liu, Xu-Yong Chen, Xiao-Jie Cao, Wenmin Zhang, Li-Hui Cao","doi":"10.1021/prechem.4c00102","DOIUrl":"https://doi.org/10.1021/prechem.4c00102","url":null,"abstract":"Stimuli-responsive smart materials, as an emerging material, can fulfill reversible transformation of chemical/physical properties under external stimuli such as mechanical stress, light, and electricity, which has the highlights of rapid response, designable structure, and function. Two ionic hydrogen-bonded organic frameworks (iHOFs 36-37) were synthesized by self-assembly of bis(benzene-o/p-sulfonic acid)-naphthalenediimide (o/p-H2BSNDI) and two basic ligands. The naphthalenediimide (NDI) was introduced into the material to equip iHOFs 36-37 with radical-driven photochromic behavior. The proton conductivity of iHOF-37 demonstrated a maximum of 6.50 × 10-4 S·cm-1 at 98% RH and 100 °C, and it increased to 9.10 × 10-3 S·cm-1 due to dual free radical synergism following UV irradiation (NDI and viologen), which represents a significant 14-fold enhancement. Furthermore, the incorporation of iHOF-37 into the chitosan (CS) matrix forms photochromic composite membranes. The proton conductivity of the 5%-iHOF-37/CS composite membrane reached up to 5.70 × 10-2 S·cm-1 at 98% RH and 90 °C, and reached 8.08 × 10-2 S·cm-1 after UV irradiation. This work reveals the dual radicals generated by NDI and viologen derivatives, whose synergistic action plays a significant role in enhancing the proton conductivity in iHOFs and composite membranes, rendering the rational design of stimuli-responsive smart materials feasible.","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":"3 4","pages":"221-230"},"PeriodicalIF":0.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12042133/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144050647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual Free Radical Synergism for Enhancing Proton Conductivity in Photochromism iHOFs 双自由基协同作用增强光致变色iof中质子电导率

Precision Chemistry Pub Date : 2025-02-20 DOI: 10.1021/prechem.4c0010210.1021/prechem.4c00102

Cheng Liu, Xu-Yong Chen*, Xiao-Jie Cao, Wenmin Zhang and Li-Hui Cao*,

{"title":"Dual Free Radical Synergism for Enhancing Proton Conductivity in Photochromism iHOFs","authors":"Cheng Liu, Xu-Yong Chen*, Xiao-Jie Cao, Wenmin Zhang and Li-Hui Cao*, ","doi":"10.1021/prechem.4c0010210.1021/prechem.4c00102","DOIUrl":"https://doi.org/10.1021/prechem.4c00102https://doi.org/10.1021/prechem.4c00102","url":null,"abstract":"Stimuli-responsive smart materials, as an emerging material, can fulfill reversible transformation of chemical/physical properties under external stimuli such as mechanical stress, light, and electricity, which has the highlights of rapid response, designable structure, and function. Two ionic hydrogen-bonded organic frameworks (iHOFs 36–37) were synthesized by self-assembly of bis(benzene-o/p-sulfonic acid)-naphthalenediimide (o/p-H2BSNDI) and two basic ligands. The naphthalenediimide (NDI) was introduced into the material to equip iHOFs 36–37 with radical-driven photochromic behavior. The proton conductivity of iHOF-37 demonstrated a maximum of 6.50 × 10–4 S·cm–1 at 98% RH and 100 °C, and it increased to 9.10 × 10–3 S·cm–1 due to dual free radical synergism following UV irradiation (NDI and viologen), which represents a significant 14-fold enhancement. Furthermore, the incorporation of iHOF-37 into the chitosan (CS) matrix forms photochromic composite membranes. The proton conductivity of the 5%-iHOF-37/CS composite membrane reached up to 5.70 × 10–2 S·cm–1 at 98% RH and 90 °C, and reached 8.08 × 10–2 S·cm–1 after UV irradiation. This work reveals the dual radicals generated by NDI and viologen derivatives, whose synergistic action plays a significant role in enhancing the proton conductivity in iHOFs and composite membranes, rendering the rational design of stimuli-responsive smart materials feasible.","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":"3 4","pages":"221–230 221–230"},"PeriodicalIF":0.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/prechem.4c00102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ring Polymer Molecular Dynamics Rates for Hydrogen Recombinative Desorption on Pt(111). Pt（111）上氢重组脱附的环状聚合物分子动力学速率。

Precision Chemistry Pub Date : 2025-02-06 eCollection Date: 2025-06-23 DOI: 10.1021/prechem.4c00099

Liang Zhang, Florian Nitz, Dmitriy Borodin, Alec M Wodtke, Hua Guo

引用次数: 0

Ring Polymer Molecular Dynamics Rates for Hydrogen Recombinative Desorption on Pt(111) Pt（111）上氢重组脱附的环状聚合物分子动力学速率

Precision Chemistry Pub Date : 2025-02-06 DOI: 10.1021/prechem.4c0009910.1021/prechem.4c00099

Liang Zhang, Florian Nitz, Dmitriy Borodin, Alec M. Wodtke and Hua Guo*,

引用次数: 0

HCl Treatment of Mixed-Phase MoVTeNbO _x Catalysts for Enhanced Performance in Selective Oxidation of Propane. 混合相MoVTeNbO x催化剂的HCl处理提高丙烷选择性氧化性能。

Precision Chemistry Pub Date : 2025-01-30 eCollection Date: 2025-04-28 DOI: 10.1021/prechem.4c00089

Zeyue Wei, Hanzhi Zhang, Yunxing Bai, Xuanyu Zhang, Weixin Huang

{"title":"HCl Treatment of Mixed-Phase MoVTeNbO x Catalysts for Enhanced Performance in Selective Oxidation of Propane.","authors":"Zeyue Wei, Hanzhi Zhang, Yunxing Bai, Xuanyu Zhang, Weixin Huang","doi":"10.1021/prechem.4c00089","DOIUrl":"https://doi.org/10.1021/prechem.4c00089","url":null,"abstract":"Hydrothermally synthesized mixed-phase MoVTeNbO x catalysts are active for catalyzing the selective oxidation of propane to acrylic acid but suffer from the presence of the amorphous phase and low specific surface areas. Herein we report that HCl treatment preferentially dissolves the amorphous phase in hydrothermally synthesized mixed-phase MoVTeNbO x catalysts and increases the catalytic performance. An optimal HCl treatment significantly increases the C3H8 conversion from 38.9% to 58.2% without changing the acrylic acid selectivity in the selective oxidation of propane to acrylic acid at 380 °C. The original and HCl treated catalysts exhibit similar apparent activation energies, while HCl treatment increases the specific surface area, surface acid sites, surface V5+ density, and C3H8 and C3H6 irreversible adsorption amounts but decreases the C3H8 and C3H6 irreversible adsorption heats. The C3H8 conversion rate is proportional to the surface V5+ density and C3H8 irreversible adsorption amount, and the TOF is measured as 3.31 ± 0.08 × 10-5 s-1 at 340 °C. Thus, HCl treatment enhances the catalytic performance of mixed-phase MoVTeNbO x catalysts mainly by increasing the active site density rather than by increasing the active site activity. Our results provide an effective approach to prepare highly active mixed-phase MoVTeNbO x catalysts for the selective oxidation of propane to acrylic acid.","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":"3 4","pages":"206-213"},"PeriodicalIF":0.0,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12042132/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144064859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HCl Treatment of Mixed-Phase MoVTeNbOx Catalysts for Enhanced Performance in Selective Oxidation of Propane 混合相MoVTeNbOx催化剂的HCl处理提高丙烷选择性氧化性能

Precision Chemistry Pub Date : 2025-01-30 DOI: 10.1021/prechem.4c0008910.1021/prechem.4c00089

Zeyue Wei, Hanzhi Zhang, Yunxing Bai, Xuanyu Zhang and Weixin Huang*,

{"title":"HCl Treatment of Mixed-Phase MoVTeNbOx Catalysts for Enhanced Performance in Selective Oxidation of Propane","authors":"Zeyue Wei, Hanzhi Zhang, Yunxing Bai, Xuanyu Zhang and Weixin Huang*, ","doi":"10.1021/prechem.4c0008910.1021/prechem.4c00089","DOIUrl":"https://doi.org/10.1021/prechem.4c00089https://doi.org/10.1021/prechem.4c00089","url":null,"abstract":"Hydrothermally synthesized mixed-phase MoVTeNbOx catalysts are active for catalyzing the selective oxidation of propane to acrylic acid but suffer from the presence of the amorphous phase and low specific surface areas. Herein we report that HCl treatment preferentially dissolves the amorphous phase in hydrothermally synthesized mixed-phase MoVTeNbOx catalysts and increases the catalytic performance. An optimal HCl treatment significantly increases the C3H8 conversion from 38.9% to 58.2% without changing the acrylic acid selectivity in the selective oxidation of propane to acrylic acid at 380 °C. The original and HCl treated catalysts exhibit similar apparent activation energies, while HCl treatment increases the specific surface area, surface acid sites, surface V5+ density, and C3H8 and C3H6 irreversible adsorption amounts but decreases the C3H8 and C3H6 irreversible adsorption heats. The C3H8 conversion rate is proportional to the surface V5+ density and C3H8 irreversible adsorption amount, and the TOF is measured as 3.31 ± 0.08 × 10–5 s–1 at 340 °C. Thus, HCl treatment enhances the catalytic performance of mixed-phase MoVTeNbOx catalysts mainly by increasing the active site density rather than by increasing the active site activity. Our results provide an effective approach to prepare highly active mixed-phase MoVTeNbOx catalysts for the selective oxidation of propane to acrylic acid.","PeriodicalId":29793,"journal":{"name":"Precision Chemistry","volume":"3 4","pages":"206–213 206–213"},"PeriodicalIF":0.0,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/prechem.4c00089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Precision Chemistry Pub Date : 2025-01-27

Zheng Zhou*, Yong Yang*, Jianwei Liang, Sota Sato, Zhenyi Zhang and Zheng Wei,

引用次数: 0

Precision Chemistry Pub Date : 2025-01-27

Ryota Tajima, Keisuke Tanaka, Kazuhiro Aida, Eisuke Ota* and Junichiro Yamaguchi*,

引用次数: 0

Precision Chemistry Pub Date : 2025-01-27

Jui-Han Fu*, De-Chian Chen, Yen-Ju Wu and Vincent Tung*,

引用次数: 0